Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a31c720e2f49927…

MALICIOUS

PDF

68.5 KB Created: 2021-09-27 21:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0eb5510c5101decb33a3751616b9ff96 SHA-1: b1b5cc6a270407ca51b9ac9a2178015e399bd3e4 SHA-256: 6a31c720e2f49927200a9eb30a8c85ffcf50f975daec0f54e4b46cad8dda81d5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF_IMAGE_LURE heuristic indicates it likely presents a screenshot to obscure clickable actions, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/uplcv?utm_term=online+watch+movie+apk PDF link annotation
    • https://ipmgrouphr.com/uploads/news_file/43400212142.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/09/202109130827352190.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021091417445973499.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/6195158599.pdfIn PDF document text
    • http://jainfarms.com/uploads/bofotevozuzifozen.pdfIn PDF document text
    • https://citronel.com/userfiles/files/jogoxavero.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/14727207922.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///guxutuxafonitezuzu.pdfIn PDF document text
    • https://netpage.info/userfiles/file/84540569322.pdfIn PDF document text
    • http://prestopc.it/upload/file/mezutil.pdfIn PDF document text
    • https://mavibusiness.it/file/57248961746.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/92b93e46116b1d7dcb99e22e75e5e537/79699443444.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/90383976758.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fef1d9960f---70965842045.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/faxigojuberijudubelika.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/83603317935.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/mewesemu.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/segeribuxozowiluvusavup.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615021bf7482c---14280892969.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/kifipobuvusazitenur.pdfIn PDF document text
    • https://drlalashow.com/php/billboard/uploads/file/83622686719.pdfIn PDF document text
    • http://micdelhi.in/userfiles/file/zufugekasifedoniko.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05A 10640 bytes
SHA-256: d339398316e86ba0d0c07c86a785d3f306939301fe18caa0d8f927994d058e5a
font_01_sfnt_off0000c895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC895 14356 bytes
SHA-256: 01945a4174ac40eae6d093746d8fe8b95ceee3098dff0530764248bf5ea3d2b3
font_02_sfnt_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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